Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df38ba041097c86…

MALICIOUS

PDF

77.7 KB Created: 2021-03-29 03:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2e3b07d85b3fd454a82d045feecc4cb1 SHA-1: 5a7d600ad65ad9cca451f8baaadb829b73192149 SHA-256: 3df38ba041097c868da8e3b68042afd1ef795d451b57ded935d1ddeae8f15c5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a PDF link farm, with the primary URL being fokemale.ru. This suggests a phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fokemale.ru/123?utm_term=amiga+mia+alejandro+sanz PDF link annotation
    • http://rowaxamapitowej.getenjoyment.net/livro_associativismo_e_cooperativismo.pdfIn PDF document text
    • https://noragunefide.weebly.com/uploads/1/3/1/6/131637841/pogomodapil-vomixofu-gobukijepegav.pdfIn PDF document text
    • https://lenatazuponos.weebly.com/uploads/1/3/4/8/134888684/2453865.pdfIn PDF document text
    • https://dopolijakom.weebly.com/uploads/1/3/4/5/134527788/8863740.pdfIn PDF document text
    • https://kuxokovu.weebly.com/uploads/1/3/0/7/130738635/714266.pdfIn PDF document text
    • http://potozafit.medianewsonline.com/geometric_distribution_proof.pdfIn PDF document text
    • https://bifepafu.weebly.com/uploads/1/3/5/3/135315465/7583591.pdfIn PDF document text
    • http://mesutilixuta.sportsontheweb.net/24701962396.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/78790373852.pdfIn PDF document text
    • https://a16eeaf1-ab09-4fb7-bdbc-3ebfa24c279d.filesusr.com/ugd/03042f_eab3d7f9e5894f069753060f83f25935.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/nakulunuwafuvazemusodad.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/38198532956.pdfIn PDF document text
    • http://jumawivowibeb.onlinewebshop.net/abc_biochemistry_book.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/wigizumujoralabudob.pdfIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_cc835006050c43a1b7302420b446f210.pdf?index=trueIn PDF document text
    • http://kogotiru.myartsonline.com/47466090660.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/zativolibivokilo.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/63857653257.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/32959208905.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/viginos.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/biriyani_tamil_movie_songs_free_320kbps.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF217 5260 bytes
SHA-256: d8e65bedac02506084524fae94651a68cf01019f403f5156494a8f6fef4a8315
font_01_sfnt_off000103ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EE 11100 bytes
SHA-256: 8f66daf29d873e61a378d1739f65f19b71859e292ce04a3f4879cc964387d5ab

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